Manage Yammer domains across their lifecycle in Office 365

As the Office 365 administrator, you manage Yammer domains in Office 365 from the Domains link in the Office 365 admin center. When you add or remove a domain in Office 365, it will be automatically added to or removed from the corresponding Yammer network, usually within minutes. For more information, see Add your users and domain to Office 365.

If you just have one domain, or don't have a legacy Yammer network from before you started using Office 365, you don't need to read the rest of this article. Once your domain is set up in Office 365, you're all set for using Yammer.

If you have multiple domains but no legacy Yammer networks, setting up your domains in Office 365 is straightforward. For example, say you have an Office 365 subscription that uses the domain contoso.com, and a corresponding Yammer network. If you add a domain contosopharmaceuticals.com to your Office 365 tenant, that domain will be automatically added to Yammer. After this, a new user of that domain, such as ryani@contosopharmaceuticals.com, could log in to Yammer seamlessly with Office 365 credentials.

Where it gets a little more complicated is when you have a legacy Yammer network associated with one or more of your domains.

How to verify that a domain you added in Office 365 has also been added to Yammer

To check if a domain was successfully updated in Yammer, you can check the list of domains available in Yammer's Network Migration page.

You must be a global administrator on Office 365 who was synchronized to Yammer as a verified admin to perform these steps.

Verify Yammer domains by using the Network migration page

In Yammer, select the Yammer settings icon
in the left nav, and then click Network Admin.

In the Network section choose Network Migration.

In the Step 1 of 3 – Check/Add Verified Domains page, you'll see the list of domains on the Yammer network.

Yammer primary domain and network name

When your Yammer domains are managed in Office 365, the Yammer primary domain and network name are also managed in Office 365.

When the Organization profile name changes in Office 365, the corresponding Yammer network name is updated. The Yammer network name is part of the header name for groups in the left menu.

The Yammer network name is always synced as the "Company name" of the Office 365 tenant. This overrides the Network Name set in the Yammer Network admin.

When the default domain changes in Office 365 to a verified domain, for example, contosoart.com, the primary domain of the corresponding Yammer network is updated. The updated Yammer primary domain, for example, contosoart.com, is used whenever you invite a new user to Yammer.

If the default domain is the initial domain that ends with .onmicrosoft.com, or the Office 365 tenant is associated with more than one Yammer network - the primary domain of the corresponding Yammer network will not be updated.

Scenarios

Your Office 365 tenant might be associated with more than one Yammer network, or the domains on your Office 365 tenant might be different from those on the corresponding Yammer network. See what to do in the scenarios below.

Note that tailspin.com on the Yammer network is not verified on the Office 365 tenant. If your network is in this situation, you cannot manage your domains across their lifecycle in Office 365. However, you can remedy the situation so that you can manage the domains from Office 365. To do this, you have two options. You can either:

Add and verify the missing domains to the Office 365 tenant. In the example above, you would add tailspin.com to the Office 365 tenant.

Remove the additional domain in Yammer. To remove Yammer domains from your network, contact the Yammer support team. In the example above, you would remove tailspin.com

After you take one of the actions above, the rest of the domains (contoso.onmicrosoft.com, northwind.com) will be added to Yammer, and from this point on, you can manage your domains across their lifecycle in Office 365.

Tip: To ensure that you don’t miss this step, all Yammer verified administrators will receive an email notification if the list of domains on Yammer is out of sync with the list on Office 365.